128005926 has 32 divisors (see below), whose sum is σ = 275763840. Its totient is φ = 39481344.

The previous prime is 128005921. The next prime is 128005931. The reversal of 128005926 is 629500821.

It is an interprime number because it is at equal distance from previous prime (128005921) and next prime (128005931).

It is a super-2 number, since 2×128005926² = 32771034182234952, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128005921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8155 + ... + 17958.

It is an arithmetic number, because the mean of its divisors is an integer number (8617620).

Almost surely, 2^128005926 is an apocalyptic number.

128005926 is an abundant number, since it is smaller than the sum of its proper divisors (147757914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128005926 is a wasteful number, since it uses less digits than its factorization.

128005926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26180.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 128005926 is about 11313.9703906277. The cubic root of 128005926 is about 503.9761972256.

The spelling of 128005926 in words is "one hundred twenty-eight million, five thousand, nine hundred twenty-six".